动态sql远程调用包里面的函数

最新推荐文章于 2020-10-21 14:29:31 发布

转载最新推荐文章于 2020-10-21 14:29:31 发布 · 62 阅读

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原文链接：http://www.cnblogs.com/itelite/articles/1152931.html

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#数据库

本文介绍如何在Oracle数据库中通过DBLink实现远程调用包内的函数并返回值的方法。包括适当的授权步骤、创建数据库链接及使用动态SQL执行远程查询。

有朋友在留言板问:如何通过动态sql远程调用包里面的函数，并返回值。

我简单做了一个例子，实现以上要求.
首先进行适当授权：

    [oracle@jumper oracle]$ sqlplus "/ as sysdba"



    SQL*Plus: Release 9.2.0.4.0 - Production on Tue Nov 7 21:07:56 2006


    Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.

    Connected to:
    Oracle9i Enterprise Edition Release 9.2.0.4.0 - Production
    With the Partitioning option
    JServer Release 9.2.0.4.0 - Production

    SQL> grant create public database link to eygle; bitsCN.com
    Grant succeeded.
    SQL> grant all on dbms_flashback to eygle;
    Grant succeeded.
建立DB Link:
    SQL> connect eygle/eygle
    Connected.
    SQL> create public database link hsbill using 'hsbill';

    Database link created.

    SQL> select db_link from dba_db_links;

    DB_LINK
    ---------------------------------------------------
    HSBILL

    SQL> select * from dual@hsbill;

    D
    -
    X

此后可以尝试使用DB Link进行远程和本地执行:

SQL> set serveroutput on
SQL> set feedback off
SQL> declare
2 r_gname varchar2(40);
3 l_gname varchar2(40);
4 begin
5 execute immediate
6 'select GLOBAL_NAME from global_name@hsbill' into r_gname;
7 dbms_output.put_line('gname of remote:'||r_gname);
8 select GLOBAL_NAME into l_gname from global_name;
9 dbms_output.put_line('gname of locald:'||l_gname);
10 end;
11 /
gname of remote:HSBILL.HURRAY.COM.CN
gname of locald:EYGLE

远程Package或Function调用也可以随之实现:

SQL> declare
2 r_scn number;
3 l_scn number;
4 begin
5 execute immediate
6 'select dbms_flashback.GET_SYSTEM_CHANGE_NUMBER@hsbill from dual' into r_scn;
7 dbms_output.put_line('scn of remote:'||r_scn);
8 end;
9 /
scn of remote:18992092687

SQL>

-The End-

转载于:https://www.cnblogs.com/itelite/articles/1152931.html